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space_view3d_toggle_views.py
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space_view3d_toggle_views.py
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# ##### BEGIN GPL LICENSE BLOCK #####
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
bl_info = {
'name': '3D View: Toggle Views',
'author': 'Evgen Zaitsev',
'version': ( 0, 1 ),
'blender': ( 2, 6, 3 ),
'location': 'View3D > Alt Q',
'description': 'toggle Camera from PERSP view to SIDE view and back (depends of camera vector)',
'wiki_url': 'http://evgeniyzaitsev.com/2012/05/29/3d-view-toggle-views/',
'tracker_url': 'None',
'category': '3D View'}
import bpy
import mathutils
import copy
import math
global m_toggleViewsCounter
global m_distance
global m_location
global m_rotation
m_toggleViewsCounter = 0
def findMaximum( m_list ):
''' find maximum value in a list '''
m_max = m_list[0]
m_max_index = 0
for m_ind in range( len( m_list ) ):
if m_list[ m_ind ] > m_max:
m_max = m_list[ m_ind ]
m_max_index = m_ind
return m_max_index
def perspToOrtho():
for area in bpy.context.screen.areas:
if area.type == "VIEW_3D":
break
m_region3D = area.spaces.active.region_3d
# toggle to 'ORTHO'
m_region3D.view_perspective = 'ORTHO'
# look rotation when it goes into side view
m_region3D.lock_rotation = True
# Save viewport camera settings
global m_distance
global m_location
global m_rotation
m_distance = copy.deepcopy( m_region3D.view_distance )
m_location = copy.deepcopy( m_region3D.view_location )
m_rotation = copy.deepcopy( m_region3D.view_rotation )
# find camera vector
m_matrix = area.spaces.active.region_3d.perspective_matrix
m_Xvec = mathutils.Vector( ( 1, 0, 0 ) )
m_Yvec = mathutils.Vector( ( 0, 1, 0 ) )
m_Zvec = mathutils.Vector( ( 0, 0, 1 ) )
m_LookAtVector = mathutils.Vector( ( m_matrix[2][0], m_matrix[2][1], m_matrix[2][2] ) )
m_VdotX = m_LookAtVector.dot( m_Xvec )
m_VdotY = m_LookAtVector.dot( m_Yvec )
m_VdotZ = m_LookAtVector.dot( m_Zvec )
m_index = findMaximum( [ math.fabs( m_VdotX ), math.fabs( m_VdotY ), math.fabs( m_VdotZ ) ] )
if 0 == m_index:
if ( m_VdotX > 0 ):
m_region3D.view_rotation = mathutils.Quaternion( ( 0.5, 0.5, -0.5, -0.5 ) )
#print ( 'LEFT' )
#bpy.ops.view3d.viewnumpad( type = 'LEFT' )
else:
m_region3D.view_rotation = mathutils.Quaternion( ( 0.5, 0.5, 0.5, 0.5 ) )
#print ( 'RIGHT' )
#bpy.ops.view3d.viewnumpad( type = 'RIGHT' )
elif 1 == m_index:
if ( m_VdotY > 0 ):
m_region3D.view_rotation = mathutils.Quaternion( ( 1.0, 0.0, 0.0), math.radians( 90.0 ) )
#print ( 'FRONT' )
#bpy.ops.view3d.viewnumpad( type = 'FRONT' )
else:
m_region3D.view_rotation = mathutils.Quaternion( ( 0.0, 0.0, 0.7071, 0.7071 ) )
#print ( 'BACK' )
#bpy.ops.view3d.viewnumpad( type = 'BACK' )
elif 2 == m_index:
if ( m_VdotZ > 0 ):
m_view_quat = veiw_rotation( m_view_quaternion = m_region3D.view_rotation, type = 'BOTTOM' )
m_region3D.view_rotation = m_view_quat
#print ( 'BOTTOM' )
#bpy.ops.view3d.viewnumpad( type = 'BOTTOM' )
else:
m_view_quat = veiw_rotation( m_view_quaternion = m_region3D.view_rotation, type = 'TOP' )
m_region3D.view_rotation = m_view_quat
#print ( 'TOP' )
#bpy.ops.view3d.viewnumpad( type = 'TOP' )
return
def orthoToPersp():
for area in bpy.context.screen.areas:
if area.type == "VIEW_3D":
break
m_region3D = area.spaces.active.region_3d
# toggle to 'PERSP'
m_region3D.view_perspective = 'PERSP'
m_region3D.lock_rotation = False
# Resotre viewport
m_region3D.view_distance = m_distance
m_region3D.view_location = m_location
m_region3D.view_rotation = m_rotation
return
def veiw_rotation( m_view_quaternion, type = 'TOP'):
if ( 'TOP' == type ):
m_dot = m_view_quaternion.w
m_a = m_view_quaternion.w
m_b = m_view_quaternion.z
elif( 'BOTTOM' == type ):
m_dot = m_view_quaternion.y
m_a = m_view_quaternion.x
m_b = m_view_quaternion.y
if ( 0.92387 < math.fabs( m_dot ) ):
#print( "+Y" )
if ( 'TOP' == type ):
return mathutils.Quaternion( ( 1.0, 0.0, 0.0, 0.0 ) )
elif( 'BOTTOM' == type ):
return mathutils.Quaternion( ( 0.0, 0.0, -1.0, 0.0 ) )
elif ( 0.38268 >= math.fabs( m_dot ) ):
#print( "-Y" )
if ( 'TOP' == type ):
return mathutils.Quaternion( ( 0.0, 0.0, 0.0, 1.0 ) )
elif( 'BOTTOM' == type ):
return mathutils.Quaternion( ( 0.0, 1.0, 0.0, 0.0 ) )
elif ( 0.38268 < math.fabs( m_dot ) <= 0.92387 ):
if ( ( 0 < m_a and 0 < m_b ) or ( 0 > m_a and 0 > m_b ) ):
if ( 'TOP' == type ):
#print( "-X" )
return mathutils.Quaternion( ( 0.7071, 0.0, 0.0, 0.7071 ) )
elif( 'BOTTOM' == type ):
#print( "+X" )
return mathutils.Quaternion( ( 0.0, 0.7071, 0.7071, 0.0 ) )
else:
if ( 'TOP' == type ):
#print( "+X" )
return mathutils.Quaternion( ( -0.7071, 0.0, 0.0, 0.7071 ) )
elif( 'BOTTOM' == type ):
#print( "-X" )
return mathutils.Quaternion( ( 0.0, 0.7071, -0.7071, 0.0 ) )
class toggleViewsOp( bpy.types.Operator ):
bl_idname = "view3d.toggle_views_op"
bl_label = "Toggle Views"
bl_options = {'REGISTER'}
def execute( self, context ):
global m_toggleViewsCounter
m_toggleViewsCounter += 1
if ( m_toggleViewsCounter % 2 ):
perspToOrtho()
else:
orthoToPersp()
return {'FINISHED'}
def register():
bpy.utils.register_module( __name__ )
wm = bpy.context.window_manager
km = wm.keyconfigs.addon.keymaps.new( name='3D View Generic', space_type='VIEW_3D' )
#kmi = km.keymap_items.new( idname = 'view3d.toggle_views_op', type = 'ACCENT_GRAVE', value = 'PRESS', alt=True)
kmi = km.keymap_items.new( idname = 'view3d.toggle_views_op', type = 'Q', value = 'PRESS', alt=True)
def unregister():
bpy.utils.unregister_module( __name__ )
wm = bpy.context.window_manager
km = wm.keyconfigs.addon.keymaps[ '3D View Generic' ]
for kmi in km.keymap_items:
if kmi.idname == 'view3d.toggle_views_op':
km.keymap_items.remove( kmi )
break
if __name__ == "__main__":
register()

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